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Print at Jan 21, 2026, 8:41:32 AM

Posted by Puybaret at Feb 8, 2020, 5:25:07 PM

Re: Several rendering engines in the same plugin
In render method, you could create a camera with a different name for each rendered frame using a name equal to UUID.randomUUID().toString(). For the background and the sun, I don't see any way in YafaRay to replace a light by another one, remove a light from the rendered scene or disable a light.
You could ensure that they are created only once but this would forbid to simulate sun moves during the day. You could also compare sunDirection to its value during the previous call to render, and if it changed, delete the scene and environment with a call to finalize() and create again the environment and the scene like in YafarayRenderer constructor (this will slow down video creation process compared to SunFlow renderer, but changing time during a video is probably not a common use of the video creation tool).

Good luck!
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Emmanuel Puybaret, Sweet Home 3D creator

Posted by enkonyito at Feb 11, 2020, 9:44:12 PM

Re: Several rendering engines in the same plugin
I used a unique identifier for the background, the sun and the camera.

String backgroundName = "background";
String cameraName = "camera";
...
createBackground(backgroundName = UUID.randomUUID().toString(), params);
...
createLight(UUID.randomUUID().toString(), params);
...
createCamera(cameraName = UUID.randomUUID().toString(), params);
...
params.put("camera_name", cameraName);
params.put("background_name", backgroundName);

To be sure they are not created several times in order not to slow down the video rendering, I put the call to the YafarayRenderer constructor in the renderImageAt method of the PhotoImageGenerator class.
I did the same for the call to the SunflowRenderer constructor and I adapted the management of the variable light sources.

These modifications allow to animate the camera and simulate the movements of the sun during the day regardless of the selected rendering engine.
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EnkoNyito

Posted by Puybaret at Feb 12, 2020, 12:55:29 AM

Re: Several rendering engines in the same plugin
If by "calling the YafarayRenderer constructor", you mean programming new YafarayRenderer(...) for each frame of the video, I don’t understand how it couldn’t not slow down the creation of the video. This constructor creates many objects and calls many methods of the rendering engine to create the scene! Or maybe, you meant something else...
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Emmanuel Puybaret, Sweet Home 3D creator

Posted by enkonyito at Feb 12, 2020, 3:30:00 PM

Re: Several rendering engines in the same plugin
As it is not possible to remove a light created during the first video frame in YafaRay, a single call to new YafarayRenderer has the consequence of adding new lights to the scene with each new frame which slows down the video rendering.
Using finalize(), Sweet Home 3D crashes by generating a .log file in the plug-in project folder.

With several calls to new YafarayRenderer as for photos at points of view, a new scene is created with each video frame and the problem of removing lights does not arise.
The surprise is that the video rendering is no longer slowed down and is even faster than SunFlow.
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EnkoNyito

Posted by Puybaret at Feb 13, 2020, 12:24:36 AM

Re: Several rendering engines in the same plugin
Keep it that way if you want, at least it works. I'll study another way in the next version.
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Emmanuel Puybaret, Sweet Home 3D creator

Posted by enkonyito at May 13, 2020, 4:51:08 AM

Re: Several rendering engines in the same plugin
Changes made to version 1.1 of the YafaRay plug-in

if (this.sunDirection == null || !Arrays.equals(this.sunDirection, sunDirection)) {
  if (this.sunDirection != null) {
    try {
      // Reinitialize renderer because Yafaray doesn't allow to modify or delete lights
      dispose();
      finalize();
      init();
    } catch (IOException ex) {
      // Shouldn't happen since first initRenderer call worked
    }
  }
  if (sunDirection [1] > -0.075f) {
    ...
  }
  
  this.sunDirection = sunDirection;
}

have an impact on variable light sources (daylight or automatic).

Their power is linked to sunDirection [1] which is initialized before the call to the exportLightSource method.

this.sunDirection = getSunDirection(this.compass, Camera.convertTimeToTimeZone(this.home.getCamera().getTime(), this.compass.getTimeZone()));

If I keep this initialization, the sky or the sun is no longer visible.

Automatic light off.

Automatic light on.

Do you have any advice to resolve this situation?
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EnkoNyito

Posted by Puybaret at May 18, 2020, 7:58:00 PM

Re: Several rendering engines in the same plugin
Sorry Enkonyito, I should have better tested the changes I made for video generation in the version 1.1 of the YafaRay plug-in. The issues should be fixed in version 1.2 that I tested by rendering images more than once with a camera time and place change between frames.
You'll see that I also added to YafaRay some methods able to remove lights, backgrounds, integrators and cameras, to prevent the need to restart YafaRay engine between two frames.
Hope you can integrate these changes more easily in your plug-in.
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Emmanuel Puybaret, Sweet Home 3D creator

Posted by enkonyito at May 19, 2020, 1:45:03 AM

Re: Several rendering engines in the same plugin
This will be a great help to advance in compatibility with the YafaRay plug-in!
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EnkoNyito

Posted by Forestsun at Aug 17, 2020, 2:38:29 AM

Re: Several rendering engines in the same plugin
How to reduce the size of the plug-in (12 MB) to speed up uploading?

Posted by Puybaret at Aug 17, 2020, 4:50:03 PM

Re: Several rendering engines in the same plugin

How to reduce the size of the plug-in (12 MB) to speed up uploading?

Remove some DLLs of the system you don’t want to support.
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Emmanuel Puybaret, Sweet Home 3D creator

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Jan 21, 2026, 8:41:32 AM